Year	Thousands Of Dollars
1916	70773.0
1917	63903.0
1918	71473.0
1919	180954.
1920	176505.
1921	414489.
1922	280456.
1923	334254.
1924	307091.
1925	209957.
1926	183474.
1927	246924.
1928	207416.
1929	198440.
1930	238459.
1931	325963.
1932	287042.
1933	248127.
1934	165373.
1935	173879.
1936	130925.
1937	133296.
1938	167122.
1939	124706.
1940	112632.